Let me start this off by stating that I firmly believe that both of the Kingdom Hearts HD collections are great games and offer a ton of fun. The games have bosses, cutscenes, Keyblades, and more that wasn't originally in the first games so they are both worth a look from that viewpoint alone. And they aren't overly expensive, so owning both won't set you back all that much. Again, a big plus. But games always get compared to other games, so let's look at which game is the best overall of the two. Obviously this is only my opinion, but here goes. I think Kingdom Hearts 1.5 is the best in that it has the game that started it all. I think I've put more time into the first Kingdom Hearts than any of the other games to follow. I've played Kingdom Hearts 2, Birth By Sleep, 3D and others for several hours as well but I think the original got the most time out of me. So the fact that it's on the first HD remix, along with extra bosses and things to look for, makes the first HD remix game incredible. Each game comes with two playable games and a game film, so there is more to the 1.5 remix than KH1. With that in mind I truly believe that the Chain of Memories game brings down the 1.5 remix. It's not the worst game of all time, but I don't find it as enjoyable as I used to so I think it drags it down. The film, based on Kingdom Hearts 358/2 Days, isn't terrible. So this game starts strong, gets weak, and ends fine with the film. Overall an 8/10 I'd say. Kingdom Hearts 2.5 is the best in that it has Birth By Sleep. Not only is this game very important for the series with Xehanort and his ambitions, but the game is just plain fun in general. I love that all three main characters have different stories in each world because it adds good replay value and gives you a lot to look forward to. The worlds are fairly large so you have a lot to explore, and none of this includes the mini games or the Mirage Arena. The 2.5 remix version also has more weapons, boss fights, cutscenes, and more so it takes what's possibly the best Kingdom Hearts game and makes it even better. Kingdom Hearts 2 is also a playable game on this disc and this game is still a great game to this day. It has the extras the other games do as well, so it keeps the strength of this purchase at a high value. The film, based on Kingdom Hearts Re:Coded, isn't bad and adds some new story content that hasn't been seen in the series before, so it's worth a look just for that. Overall, though both games are great, I have to say that this one is the best purchase. It's a 9.5/10 to me, it's almost perfect. It has more to do, a better pairing of games, and is more enjoyable. But that's just me! Which do you think is the best of the two and why?